Refer to http://incubator.apache.org/projects/airflow.html
Committers are listed in a few additional places as well (Some of these may only be visible to existing committers):
Becoming a Committer :
* Consistent contributions over the past 6 months
* Expressed understanding of Airflow Core or has displayed holistic understanding of a particular part and made contributions towards a more strategic goal
* Quality of the commits